Automatic registering weighing-machine.



No. 774,777. PATENTED NOV. 15, 1904. E. POLTE.

AUTOMATIC REGISTERING WEIGHING MACHINE.

APPLICATION FILED JUNE 3,1903.

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59w %o64/, a h 7 414 7 M No. 774,777. PATENTED NOV. 15, 1904.

E. POLTE.

AUTOMATIC REGISTERING WEIGHING MACHINE.

APPLICATION FILED JUNE 3,1903.

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No. 774,777. PATENTED NOV. 15, 1904.

E. POLTE.

AUTOMATIC REGISTERING WEIGHING MACHINE. APPLICATION FILED JUNE 3.1903.R0 MODEL. a 8HEETS-SHBET 3.

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g 1 adazc UNITED STATES Patented November 15, 1904.

EUGEN POLTE, OF MAGDEBURG-SUDENBURG, GERMANY.

AUTOMATIC REGISTERING WEIGHING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 774,777, dated November15, 1904. Application filed Tune 3, 1903. Serial No. 159,918, (Nomodel.)

To all whom it may concern.-

Be it known that I, EUGEN POLTE, manufacturer, a subject of the King ofPrussia, German Emperor, residing at Magdeburg-Sudenburg, in the Kingdomof Prussia, Germany,

have invented certain new and useful Improve ments Relating to AutomaticRegistering Weighing Apparatus, of which the following is a full, clear,and exact description.

This invention relates to an automatic registering weighing apparatuswhich while capable of ascertaining the weight of materials accuratelyand rapidly combines simplicity of construction with durability.

In order to comply with the following requirements viz., accuracy andspeed in weighing, simplicity in constructiomand lasting efliciency ofthe apparatusthis latter is constructed in a manner differing from otherautomatic registering weighing apparatuses hitherto known, which isexplained by means of the following description.

One form of construction of the automatic registering weighing apparatusforming the subject of the present invention is shown by way of examplein the accompanying drawings.

Figure 1 is a vertical section of the register ing weighing apparatus.Fig. 2 is a side elevation, and Fig. 3 is a front elevation, of thesame. Figs. 4 to 10 represent separate parts of the apparatus.

The frame of the apparatus consists of the two sides 1 1, and thecross-bar 2 serving as cross connection between them. On the top of thelatter is placed the hopper 3 for receiving' the materials to beweighed. Inside this hopper two oblique baflie-plates 4 are fixed forthe purpose of counteracting the irregularities due to the varyingheights to which the hopper is filled, and they cause the pressure oncut-off quadrant 5 to be constant and'uniform. At its front part, whichpasses underneath the cut-off brush 6, the quadrant 5 is provided withone or more openings for regulating the afterfiow. To a four-armedweighing-beam 7 are attached on one side two suspension -rods 8 8, eachprovided with a turned-over portion at the top and connected together atthe bottom by a tie-rod '9. At or near their middle they carry thespindle 10 of the revolving drum 11, which latter is divided bypartitions 12 into two or more equal compartments. Inside eachcompartment a sheetmetal brake-strip 13, extending from one end of thedrum to the other, is fixed at a suitable point on or near thecircumference, so that as the goods being weighed impinge on thesestrips the drum is gradually brought to rest toward the end of therotation. On the other side of the weighing-beam 7 the frame 14,carrying the weights, is suspended, on which frame, taking the case of afive-kilogram weighing apparatus, it is assumed that two weights of twokilograms and two weights of one-half kilogram are placed. Each weightthe height of which is determined as follows:

As soon as materials of an aggregate weight of 2.5 kilograms have falleninto the drum, thus raisingthe frame 14, carrying the Weightscorrespondingly, the second tWo kilogram weight will be picked up by thebottom tie of the frame 14:, and subsequently the secondonehalf-kilogram weight will be raised off its support in the same way.The heights at which these two weigl'its, which may be termedstepweights, are disposed on their supports are in definite relation tothe movement of the cutofl quadrant 5 and to the corresponding movementof rocking lever 17. This latter performs the duty of two levers, which,if mounted separately, would regulate the twofold movement of thecut-off quadrant 5 in such amanner that after the release of the firstlever at its contact-face 17 has been effected the quadrant will beclosed, all but its afterflow-openings. The contact-face 17 b representsthe same lever, the release of which causes the afterflow-openings ofthe quadrant to be closed also. 17 and 17" are joined together by acurved arm. The form given to the latter is such that it \.-ill deadenthe movement of the drum during its downward travel, and thus have asteadying effect on the working of the apparatus. When the drum isdivided into two compartments, the rocking lever 17 is governed by theaction of two catches 18 and 19. Both are placed exactly opposite eachother at the terminal bosses of the two-armed lever 20, Fig. 2. On thedrum revolving the catches 18 and 19 act on the rocking lever 17 andraise same, together with the quadrant connected to it. Their furtherobject is to retain the drum in the intake position during charging bymeans of locking-bar 21. To this end the lockingbar 21 is actuated by aspring 21 (See Fig. 8.) At the upper end of the locking-bar the tappet22 is fixed in such a position by a pin that the rocking lever 17effects the release of catch 18 from the locking-bar the moment itstrikes against tappet 22. The two-armed lever 20 is connected to thedrum through its spindle 10. They are, however, kept sufliciently wideapart to leave room for the insertion of a drum-casing between the leverand drum end. This casing isolates the lower portion of the hopper withcut-off quadrant, as well as the drum, from all the other parts of theapparatus.

The apparatus is kept free from dust, on the one hand, by the sides ofthe frame 1 1 and the cross-bar 2 placed between them, and, on the otherhand, by a sheet-metal casing 23, abutting against the latter and madeeasily removable. This is arranged against the sides 1 1, and thus madedust-tight.

Only the spindle 10 and tie-rod 9 protrude through the walls of thedust-casing, in which slotted openings are provided for the purpose.

The usual counterbalance-lever 24 requires no special description. Thehemispherical form given to the cup 25, Figs. 4 and 5, facilitates itsadjustment into the exact position relative to its knifeedge. A screw 26serves to retain the cup in the correct position after adjustment.

Figs. 6 and 7 illustrate two new devices for counter-guides.

Attached to the frame, as well as to the suspension-rod of the drum, aretwo round studs 27, each having two notches, all the four notches beingin a horizontal plane when the balance is in the zero position. Thedistancerod 28, ending in knife-edges, serves to keep the guide-rodsasunder, while they are held together by a similar retaining-rod 29 withbent and chisel-edged ends or, as shown in Fig. 7, by crescent-shapedchisel-edged pieces 30, which engage on one side in a notch of the studand on the other in the notch of the distance-rod 31.

A substitute for the usual rocking lever 17 is represented in Fig. 8, bymeans of which it is rendered possible to advance or to retard therelease of contact-face 17 from catch 18. In order to effect thispurpose, the contactface 17 of the prism-shaped rod 32 is madeadjustable in such a way that it protrudes more or less through acorresponding guidecye 33 of rocking lever 17. Rod 32 at its upper endis screw-tl'ireaded and is adjusted and fixed by means of two nuts. Themain object of this adjustment is either to advance or to retard thecut-off of the afterflow, according to whether the contact-face 17" isat a shorter or greater distance from the shaft forming the pivot ofrocking lever 17.

Figs. 9 and 10 show a section of the dustcasing and method of renderingdrum-spindle 1O dust-proof. This is effected by the provision of twosheet-metal disks 34 and 34 at each end, afiixed to the spindle at thepoints shown, which reduce the liability of dust escaping from thedust-casing.

hat I claim as my invention, and desire to secure by Letters Patent, is

1. In a weighing apparatus, the combination with a beam and means forprogressively counterbalancing the load, of a lever having twocontact-faces and an intermediate curved surface, and a catch movingwith the beam, said contact-faces adapted to successively engage saidcatch, and said parts being adapted to operate in such manner that aportion of the counterbalancing means is applied to the scalebeam whenthe first contact-face disengages from said catch, and a portion whenthe second contact-face makes such disengagement, and said curvedsurface being adapted to engage a part moving with the beam to deadenthe oscillations of the latter.

2. In a weighing apparatus, the combination with a beam and means forprogressively counterbalancingthe load, of a lever having twocontact-faces and an intermediate curved surface, a rotatable drumcarried by the beam, and a plurality of catches carried by said drum,said contact-faces being adapted to successively engage each of saidcatches, and said parts being adapted to operate in such manner that aportion of the counterbalancing means is applied to the scale-beam whenthe first contact-face disengages from said catch, and a portion whenthe second contact-face makes such disengagement, and said curvedsurface being adapted to engage a part moving with the beam to deadenthe oscillations of the latter.

3. In a weighing apparatus, the combination of a beam, a drum carriedthereby, a cutoff mechanism for controlling feed thereto, means forprogressively counterbalancing the load, a lever connected with suchcut-off mechanism and adapted to operate the latter, said lever havingtwo contact-faces and an intermediate curved surface, a catch movingwith the drum, said contact-faces adapted to successively engage saidcatch, and said parts being adapted to operate in such manner that apart of the counterbalancing means is applied to the scale-beam when thefirst contactface disengages from said catch and said lever operatessaid cut-off mechanism to partly close the same, and a part of saidmeans is applied When the second contact-face makes such disengagementand said lever operates to Wholly close said cut-ofi' mechanism.

4. Inaweighingapparatus, acounter-guide having two studs, each havingtwo bearings, a member having knife-edges at its ends adapted to work inone bearing of each of said studs, and means preventing separation ofsuch member from said studs having knife-edges Working in the otherbearings thereof.

EUGEN POLTE.

Witnesses:

SARAH 3. MOKELLIP, JAMES L. A. BURRELL.

